The Master Sword is a staple of the Zelda series and the most iconic piece of equipment in Link's arsenal. Known as "The Sword that Seals the Darkness" and "The Blade of Evil's Bane," the Master Sword is ordinarily the strongest sword in the game which Link needs in order to slay Ganon and rescue Princess Zelda. When at full power, the sword fires a beam of light that vanquishes evil and tends to shine with a bright light and gain power whenever evil is nearby. Link has even used the Master Sword to travel back in time in Ocarina of Time, and it has shown the power to freeze time in Wind Waker.
Source：https://www.cbr.com/zelda-master-sword-guide/
